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D工厂和居民改用较清洁的燃料可用熟石灰来处理硫酸厂排出的酸性废水，处理原理的化学方程式是____________________________________。三、计算题
f1某工厂化验室用10的氢氧化钠溶液洗涤定量石油产品中残余的硫酸，洗涤后溶液呈中性，共消耗这种氢氧化钠溶液40g。求在这一定量的石油产品里残余HSO的质量。24
四、综合题1考古发掘出的铜器表面往往有一层厚厚的铜绿主要成分CuOHCO，试用化学方程式解释223铜绿形成的原因。为什么高档电器的铜质插孔、插头表面要镀上价格比铜昂贵且导电性又不如铜的金不法商贩常在金中掺入铜打制“纯金”饰品出售。如何识别这种假冒“纯金”戒指。
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